Severance (Tables)

9 Months Ended

Sep. 30, 2017

Restructuring and Related Activities [Abstract]

Schedule of changes in accrued liability for severance expenses

Changes in our accrued liability for severance expenses were as follows:

	Severance
	(Dollars in millions)
Balance at December 31, 2016	$	52
Accrued to expense	6
Payments, net	(54		)
Balance at September 30, 2017	$	4